$7,500 - $10,000 You can find some spectacular diamonds in this price range — big and beautiful. The best value is generally found in the 1.00 - 1.10 carat range. The 1.50 carat stones in this price range will likely have a clarity grade of SI1 or lower -OR- a color grade of "H" or lower. Carat Weight: 0.70 - 1.75 Diamond Quality: Varied. Setting: 18K gold (white or yellow), Platinum